In many industrial tank applications, liquid level control must be simple, reliable and independent from electrical power. Fire-fighting water tanks, condensate tanks, food storage tanks, utility tanks and remote installations often require a mechanical solution that can open or close the flow according to the liquid level inside the tank.
The ELV Series Float Level Valves are designed for this purpose. With stainless steel construction, adjustable float arm design and different model options, ELV valves provide practical liquid level control in tanks without requiring complex electrical control systems.
What Is the ELV Series?
The ELV series is a float level valve product family used for checking and controlling liquid level in tanks. The valve operates mechanically through a float and lever mechanism.
As the liquid level rises, the float moves upward and changes the valve position. Depending on the selected operating logic and installation design, the valve can close with increasing liquid level or open to discharge when the liquid rises. When the level decreases, the valve returns to its previous position.
This simple mechanical operation makes the ELV series suitable for applications where reliable level control is required without electricity.
Operating Principle
The ELV float level valve uses a float connected to a lever arm. The float follows the liquid level inside the tank. When the level changes, the lever transfers this movement to the valve piston mechanism.
When the liquid level increases, the valve can close to stop filling. Alternatively, in discharge applications, it can open and allow liquid to flow out. When the liquid level decreases, the float moves down and the valve changes position again.
The float length can be adjusted using the valve arm. This allows users to adapt the switching point to the tank geometry and required level control point.
Designed for Horizontal and Vertical Applications
The ELV series includes models designed for horizontal or vertical mounting. The arm and float structure can be selected according to the installation position and tank design.
This flexibility makes the series suitable for a wide range of applications, from compact tanks to larger storage vessels. Special connections and custom models can also be produced according to specific project requirements.
Stainless Steel Construction
One of the key advantages of the ELV series is its stainless steel construction. The body, piston bracket, piston, pipe nut and washer materials are 304 stainless steel as standard, with 316 stainless steel available as an option.
This construction supports durability in industrial liquid applications and provides compatibility with many process environments. Stainless steel is especially important in applications where corrosion resistance, hygiene or long service life is required.
Seal Material for Different Liquids
The standard seal material is Viton, which provides resistance for many industrial liquids. The catalog also states that seal material can be selected according to special liquids such as oil, petroleum and food-sector fluids.
This allows the ELV series to be adapted to different liquid types and process requirements.
Technical Specifications
The ELV series has a maximum working temperature of 200 °C. The working pressure range varies according to the model, generally from 2 bar to 10 bar.
Flow capacity also changes depending on the valve size and model configuration. Smaller models are suitable for compact applications, while larger flanged models can provide significantly higher flow rates.
Model Range
The ELV series includes many model options, such as ELV 00, ELV 08, ELV 10, ELV 12, ELV 15, ELV 16, ELV 18, ELV 21, ELV 31, ELV 41, ELV 51, ELV 52, ELV 41f, ELV 51f, ELV 65f, ELV 81f and ELV 101f.
This wide range allows users to select a suitable model according to connection size, flow rate, working pressure, float diameter, arm length and mounting type.
Compact Models: ELV 00 and ELV 08
The ELV 00 is designed for vertical mounting and adjustable float height. It has a 1/2" BSP + nut connection, a maximum flow range of 0.5 m³/h, maximum working pressure of 10 bar and maximum weight of 0.7 kg.
The ELV 08 is a compact model with 1/2" BSP + nut connection, maximum flow range of 1.8 m³/h, maximum working pressure of 2 bar and maximum weight of 0.7 kg.
These models are suitable for small tanks and applications where compact mechanical level control is required.
Medium-Size Models: ELV 10, ELV 12, ELV 15, ELV 16 and ELV 18
Models ELV 10, ELV 12 and ELV 15 use 3/4" BSP + nut connection and provide a maximum flow range of 3.5 m³/h. Their maximum working pressure is 10 bar, and maximum weight is 1.6 kg.
Models ELV 16 and ELV 18 also use 3/4" BSP + nut connection with the same maximum flow range of 3.5 m³/h, but their maximum working pressure is 8 bar and maximum weight is 2.5 kg.
These models are designed for applications requiring a longer lever arm and different float geometries, including spherical and cylindrical float options.
Larger Threaded Models: ELV 21, ELV 31, ELV 41 and ELV 51
For higher flow requirements, the ELV series includes larger threaded models.
ELV 21 has a 1" BSP + nut connection, maximum flow range of 6 m³/h, maximum working pressure of 6 bar and maximum weight of 2.6 kg.
ELV 31 has a 1 1/4" BSP + nut connection, maximum flow range of 9 m³/h, maximum working pressure of 6 bar and maximum weight of 2.8 kg.
ELV 41 has a 1 1/2" BSP + nut connection, maximum flow range of 12.5 m³/h, maximum working pressure of 5 bar and maximum weight of 3.4 kg.
ELV 51 has a 2" BSP + nut connection, maximum flow range of 16.5 m³/h, maximum working pressure of 5 bar and maximum weight of 3.5 kg.
These models are suitable for larger tanks and applications requiring greater flow capacity.
Flanged Models: ELV 41f and ELV 51f
The ELV series also includes flanged versions for installations where flange connection is preferred.
ELV 41f has a 1 1/2" flanged connection, maximum flow range of 12.5 m³/h, maximum working pressure of 5 bar and maximum weight of 3.4 kg.
ELV 51f has a 2" flanged connection, maximum flow range of 16.5 m³/h, maximum working pressure of 5 bar and maximum weight of 3.5 kg.
Flanged models are practical for industrial tanks where robust mechanical connection and easy maintenance access are required.
High-Flow Flanged Models: ELV 65f, ELV 81f and ELV 101f
For high-flow applications, the ELV series offers larger flanged models.
ELV 65f has a 2 1/2" flanged connection, maximum flow range of 20 m³/h, maximum working pressure of 3 bar and maximum weight of 8 kg.
ELV 81f has a 3" flanged connection, maximum flow range of 35 m³/h, maximum working pressure of 3 bar and maximum weight of 10.5 kg.
ELV 101f has a 4" flanged connection, maximum flow range of 50 m³/h, maximum working pressure of 3 bar and maximum weight of 12 kg.
These models use double float configurations and are suitable for larger tanks where high flow capacity is required.
Installation Considerations
The catalog notes that if the level valve is mounted too close to a pump, the arm should be extended or the number of floats should be increased. This is important because turbulence, suction effects or unstable liquid movement near the pump may affect float operation.
Correct installation position helps ensure stable mechanical movement and reliable valve control.
Application Areas
The ELV series is suitable for tanks, fire-fighting water tanks, condensate tanks, food storage tanks and tanks located in environments without electricity.
Because the valve operates mechanically, it is especially useful for remote installations, simple level control systems and backup applications where electrical automation is not available or not preferred.
Advantages of the ELV Series
The ELV series offers several important advantages. Special models can be produced according to customer demand, and shorter valve arm versions can be manufactured for compact spaces.
The seal can be selected according to oil, petroleum or food-sector materials. Stainless steel construction supports durability and long-term use in industrial environments.
The wide model range allows users to select the right valve according to tank size, connection type, flow rate and working pressure.
Conclusion
The ELV Series Float Level Valves provide a simple, durable and electricity-free solution for mechanical liquid level control in industrial tanks. With stainless steel construction, adjustable float arm design, Viton seal, multiple threaded and flanged model options and flow capacities up to 50 m³/h, the ELV series is suitable for a wide range of tank applications.
For fire-fighting water tanks, condensate systems, food storage tanks, utility tanks and installations without electrical power, ELV float level valves offer reliable and practical level-based flow control.